Cutter guard



Dec. 22, 1959 .J. H. PAULICK, JR

CUTTER GUARD Filed Dec. 31. 1956 mm N Z mm p a M M.

wm M! v /7 ATTORNEY CUTTER GUARD Joseph H. Paulick, Inn, Birmingham,Mich.

Application December 31, 1956, Seriai No. 631,549

3 Claims. (Cl. 206-116) This invention relates to a milling cutter guardfor use during mounting and dismounting a cutter on a machine and fortransporting and storing a cutter under protected conditions.

Various means or shields have been employed heretofore to attempt toprotect multiple blade cutters, however, the several devices of theprior art have not proven entirely satisfactory inasmuch as they havefallen into disuse and the cutters are being presently protected inindustry in wooden boxes and by wrapping them in cloths or rags.

With the foregoing in view, the primary object of the invention is toprovide a milling cutter guard which is simple in design andconstruction, inexpensive to manufacture, easy to place on a cutter, andeasy to remove from the cutter assembly.

An object of the invention is to provide a cutter guard having a splitspring steel band for opening the band to receive a cutter therein andfor the purpose of gripping the cutter via the spring tension of theband.

An object of the invention is to provide shoe portions on the band forforming a protective shroud relative to the cutter to protect both theradially extending and axially extending portions of the cutter blades.

An object of the invention is to provide tongues lanced out of the guardshoe portions for the purpose of mechanically interconnecting with thespring steel band so that it is not necessary to destroy the uniformityof the band by welding, riveting, or perforating and so that the shoeportions are slidably positionable on the bands so as to locate themaccurately in spaced relationship in conjunction with various sizebands.

An object of the invention is to provide shoe portions on the band Whichare connected thereto via a flexible bond or connection.

An object of the invention is to provide tongue portions on the shoeportions interlocking with the band in forming a resilient bond betweenthe shoe portions and the band so that it is possible for the shoeportions to move slightly relative to the band in expanding and incontracting the band so as not to bind the flexibility of the band andto permit homogeneous spring action in the band in opening and closing.

An object of the invention is to provide a cutter guard whichconstitutes stacking and holding means incident to the cutters instacked relationship.

An object of the invention is to provide shoe portions on the cutterswhich are angled inwardly so as to eliminate interference between theshoe portions and to prevent a web being formed between the shoeportions in the dipping to place a plastic skin over the shoe portionsand the band.

An object of the invention is to provide a plastic protective skin overthe shoe portions and bands so as to provide a cushion for the cutterblades during transportation and storage and to provide a cushion forthe workmans hands in handling the cutter such as in mounting anddismounting a cutter on a machine.

r 2,918,165 Patented Dec. 22, 1959 An object of the invention is toprovide a plastic skin over the shoe portions and the band whichinterlocks with the band and shoe portions so as to hold the shoeportions relative to the band in properly spaced relationship thereto.

An object of the invention is to provide a plastic skin over the shoeportions and band which is capable of flexing and moving with the bandand shoe portions.

These and other objects of the invention will become apparent byreference to the following description of a cutter guard or shroudembodying the invention taken in connection with the accompanyingdrawing in which:

Fig. 1 is a top plan view of a cutter guard embodying the invention.

Fig. 2 is a cross-sectional view of two cutters equipped with theinventive cutter guard in stacked relationship.

Fig. 3 is a perspective view of a portion of an inventive cutter guardshowing the spring band and shoe connection prior to the application ofthe plastic skin.

Fig. 4 is a cross-sectional view of Fig. 3 taken on the line 44 thereofshowing the tongues lanced from the shoe portion in the extendedposition prior to being pressed down over the band; and

Fig. 5 is a cross-sectional view of the guard similar to Fig. 4 showinga bonding agent fixing the shoe portion with the band portion.

Referring now to the drawing wherein like numerals refer to like andcorresponding parts throughout the several views, the cutter guarddisclosed therein to illustrate the invention comprises a spring band 10which is split as at 11, shoe portions 12 having toe portions 13 andheel portions 14-, and a plastic skin 15 enveloping the band 10 and shoeportions 12 in a completely enveloping protective coating providing acushion for both the cutter blades and the workmans hands.

More particularly, the spring steel band 10 is split as at 11 so as tobe capable of expanding to receive a cutter and of then contracting togrip a cutter; the shoes 12 have an arcuate body portion 16 from whichthe tongues 17 and 18 initially are lanced outwardly thereof in theposition seen in Fig. 4 prior to the insertion of the band 1%. The band10 is inserted between the lanced out tongues 17 and 18 and the tonguesare pressed down over the band so as to hold the shoe 12 on the band inproper relationship and it is to be noted that the shoes can then heslid along the band to evenly space the shoes relative to the band asseen in Fig. 1. This is an important eiement due to the fact that thesize of cutters vary greatly so that it is necessary to size the band 10to the cutter to which it is to be applied and then place as many shoeportions 12 thereon as possible without crowding or overlapping; in thisconnection it can be easily seen that the sliding relationship betweenthe shoe 12 and the band 16 provides facility for easily, properly, andevenly spacing the shoes 12 relative to each other on the band so thatit is not necessary to have different size shoes for different sizecutters.

The guard seen in Fig. 5 employs a bonding agent 19 between the band 10and the shoe 12 which may be of any metal bonding type such asCycle-Weld which is sold commercially. Handles 21 can be fastenedadjacent on the band 19 adjacent the split 11 as seen in Figs. 1-3,providing a hand grip for expanding the band in mounting the guard on acutter 22 assembly. The shoe toe portions 13 are relieved or angledinwardly so as to avoid interference with one another and the heelportions 14 are also angled inwardly to avoid interference and so thatin dipping no web forms between the various shoe portions.

It is also within the purview of the invention to provide a temporarybond such as the bond 19 between the shoes 12 and the band 10 for thepurpose of holding the shoes on the band until after the dippingoperation as it has been found that the plastic skin holds the shoeportions and band in an integrated assembly suitable for use especiallywhen the band is disposed on the outside of the shoe body portions 16 sothat the pressure of the band is transferred to the cutter 22 via theshoe portions 12.

In operation the workman spreads the handles 21 so as to open the split11 sufficiently to receive a cutter 22 therein and upon the cutter beingreceived the workman releases the handles 21 so as to permit the band 10to contract and firmly grip the cutter 22. The cutters 22 may be stackedon their tops 23 as seen in Fig. 2 or stacked on their bottoms 24 withthe inventive cutter guard providing a cushion seat. In this connectionit is to be noted that the cutter guard toeportions 13 envelop theaxially extending cutter portions 25 and that the heel portions 14 ofthe guard envelop the radially extending portions 26 of the cutterblades 27.

Although but a single embodiment of the invention has i been shown anddescribed in detail, it is obvious that many changes may be made in thesize, shape, detail and arrangement of the various elements of theinvention within the scope of the appended claims.

I claim:

1. A guard for especially sharp, very heavy, hard to handle and protect,easily shattered and broken multiple blade milling cutters having bladescircumferentially disposed with blade portions extending radially andaxially, comprising a spring steel split band for circumferentiallysurrounding the radially extending cutter portions; said band havingopposite edges, an inside face, and an outside face; shoes having a bodyportion disposed on the inside of said band adjacent to said band insideface so as to lie between said band inside face and a cutter; said bodyportion having opposed spaced sides normal to said band and opposed endsparallel to said band; tongues lanced from said shoe bodies on eitherside of said band opposite edges so as to extend over said band oppositeedges; said tongues being bent down over said ,band outside face so asto interlock said shoes on said hand; said shoe bodies beingcircumferentially slidable relative to said band to facilitate spacing;toes on one end of said shoe bodies extending radially inwardly so as tooverlie a cutters axially extending blade portion, heels on the otherend of said shoe bodies extending radially inwardly so as to overlie acutters radially extending band portion; said shoe bodies, toes, andheels being capable of gripping a cutter under the pressure of saidspring band; resilient, protective, plastic material disposed over allsaid parts in an enveloping coating so as to prevent said shoescircumferentially sliding relative to said band, to provide a protectivecushion for cutter blade sharp edges, to provide a protective cushionfor a workmans hands, and to permit co-action and parts movementrelative to opening and closing of said split band; said split band andassociated shoes and coating being capable of being sprung outwardlyopen to receive a cutter and capable of resiliently closing to hold acutter.

2. In a device as set forth in claim 1, said toe and heel portions beingangled off substantially parallel to radii so as to avoid interference.

3. In a device set forth in claim 1, handles adjacent said band splitfor opening said band.

OTHER REFERENCES Plastics (publication) pages 48, 49, and 98, 1944.

June

